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IRS records on US nonprofits: exempt status, revocations, Form 990 financials, due dates, stats.
Remote server: your requests and data go to 990.tax. Claude Code: claude mcp add --transport http 990-tax-nonprofit-lookup https://990.tax/mcp · Claude app: Settings → Connectors → Add custom connector.
The tools this server listed when we connected to it, in its own words.
search_nonprofits — Find US tax-exempt organizations by name or EIN in IRS records. Returns up to 10 matches with EIN, city, state, exempt status (active, revokget_nonprofit_profile — One organization's IRS record: exempt status, 501(c) subsection, NTEE category, ruling year, deductibility (Publication 78), fiscal year endcheck_exempt_status — Whether the IRS automatically revoked an organization's tax exemption (revocation, posting and reinstatement dates), and which of its last twhich_990_form — Which annual return applies under the IRS thresholds: 990-N (gross receipts normally $50,000 or less), 990-EZ (under $200,000 and assets undget_filing_due_date — Due date of a Form 990-N, 990-EZ, 990 or 990-PF for a fiscal year end and tax year, moved off weekends and legal holidays, the Form 8868 extget_nonprofit_stats — Counts and totals for US tax-exempt organizations from IRS public data: national, one state, or one NTEE major category (A-Z). Active organiget_top_nonprofits — Ranked lists from e-filed Form 990 returns, national (25) or per state (10): highest-paid executives, largest by revenue, most money raised,explain_irs_reject_code — Plain-English meaning of an IRS Modernized e-File business rule reject code for Forms 990-N, 990-EZ, 990 and 8868 (e.g. R0000-922-01), the INot tested by KitScout yet. When our harness runs it, pros, cons and the tasks we tried appear here, with the date and evidence.